Traveling-grate furnace



6 Sheets-Sheet 1.

(No Model.)

E. B. COXB. TRAVELING GRATE PURNAGB.

Patented Mar. 12,1895.

mi: NoRms PETE'Bco, pHoro-umu., WASHINGTON. 9. c.

6 Sheets-Sheet 2.

(No Model.)

BJB. COXE. TRAVBLING GRATB PURNAGB.

Patented Mar. 12, 1895.

(No Mpael.) 6- sheets-sheet a. B. B. COXE.

TRAVBLING. GRATE FURNAGE. l No. 535,355. Patented Mar. 12, 1895.'

W in: uonms Pgzks an. sacro-urac.. wnsmuofou n c (No Model.) ssheets-sheet 4,

E. B. COXE. TRAVELING GRTB PURNACB.

No.535`,-`355. lPatented Mar. l2, 18795'.

O www@ Wim 5553s/ "Tus cams PETERS co, FNoToLmQ. WASHINGTON, DA cy 6sneetssheet 5.

(.No Model.)

E. B. GOXB. TRAVBLING GRATB PURNAGE ,llllllll Patented Mar. 1211895.y

(No Model.) 6 sheetssnellen E. B; OXE. TRAVEL-ING GRATB FURNAGE,

Patented Mam. l2, 1895.

W1' messes.'

7m; Nomus Farms oo. PHoYaLymo, WASHINGTON. D4 n:

ECKLEY B. COXF., OF DRIFTON, PENNSYLVANIA.

TRAVELlNG-G RATE FURNACE.

SPECIFECATION forming part of Letters Patent No. 535,355, dated March12, 1 8295.

Application filed October 8, 1 894. Serial No. 525,189. (No model.)

To all whom t may concern.-

Be it known that I, ECKLEY B. COXE, a citizen of the United States,residing at Drifton, in the county of Luzerne and State of Pennsylvania,have invented certain new and useful Improvements in Traveling-GrateFurnaces, of which the following is aspeciiication.

This invention relates to traveling-grate furnaces, and is in the natureof an im provement upon the furnace described in Letters Patent of theUnited States No. 510,588, granted to me 4December 12, 1898, to whichreference may be had, the present invention residing more particularlyin the improved construction and organization of the furnace as a whole,and in the particular construction, arrangement and combination of theseveral elements comprising said furnace.

The object of my present invention is primarily to provide an improvedfurnace ofthe class specified in which the parts thereof will have thecombined qualities of lightness, stability and efliciency and may bereadily and quickly assembled and disassembled, and to secure a furnacewhich, as a whole, will be more effectual and satisfactory in itsoperation and easier of manipulation and repair than furnaces of thisclass as heretofore made.

Another object of the invention is to provide means in connection withand adapted for taking up longitudinal expansion of the traveling-grate.

In the drawings accompanying and forming part of this specification,Figure 1, Sheet 1, is a sectional side elevation of a portion of atraveling-grate furnace embodying my present improvements. Fig. 2, Sheet2, isa front elevation of 4the same, as seen from the right hand inFig. 1. Fig. 3, Sheet 3,is a vertical cross-section ofaportion ofthefurnace, on an enlarged scale, taken in line ct-a, Fig.,1 and lookingtoward the front right-hand end of said figure. Fighe, Sheet 4, is anenlarged longitudinal sectional view of a portion of the front end ofthe furnace, the grate-mechanism and certain of the parts thereof beingremoved. Fig. 5, Sheet 5, is a side elevation, on an enlarged scale, cfaportion ofthe frontend of the .frame which carries the gratemechanismand air-supply chambers. Fig. 6 is a front view` of said side frame asseen from the right hand in Fig...5 said figure showing the said sideframe supported in position by the side-wall of the furnace. Figs. 7 and8 are cross-sectional views, taken in line lJ-b and c-c, respectively,of Fig. 5 looking toward the left hand in said ligure, said figuresshowing portions of the side frame, grate-mechanism and the air-sealintermediate to the grate and side-frame. Fig. 9, Sheet 6, is a sideelevation, on a slightly reduced scale of one of the side-frames whichcarry the gratemechanism and airsupply chambers. Fig. 10 is a plan viewof the same, the upper member which constitutes one of the water-boxesof the furnace being removed. Fig. l1 is a plan view of the water box orupper member of said frame. Fig. 12 Ais a side elevation of a portion ofthe rear end of the lower member of said frame showing the means andmanner of adjusting one ofthe carriers of the traveling grate tocompensate for longitudinal eXpansion and contraction of said grate.Fig. 13, Sheet 2, is a plan view of a portion of the traveling grateproper on a scale similar to that shown in Figs. 7 and 8, and Fig. 1i isa sectional side view of the same.

Similar characters designate like parts in all of the figures.

In the furnace shown in the drawings, the furnace-chamber C is inclosedby the usual side-walls 2 and 4, and is covered by a roof A, which, inpractice, will be made of firebric-k or other like material. At therearward end of the furnace is the usual bridge-wall '7 and at theforward end thereof is the ignition-block B over which the fuel isdelivered to the traveling furnace-t1oor, designated in a general way byG, the fuel being supplied from a hopper l-I, set at the forward end ofthe furnace.

As a means for carrying the operative parts of the furnacemechanism, towit-the endless traveling grate and its supporting means, and as a meansfor supporting the air-supply apparatus, the ignition-block and portionsof the furnace-chamber-inclosing walls, I have shown my improved furnaceprovided Witha framework, designated in a general way by F, whichframework comprises, in part, two longitudinally and remotely-disposedsideframes,fand f', respectively, preferably connected together at theirends by stay-rods, 30, and preferably embedded within a masonry of theside-walls 2 and 4, respectively, of the furnace-chamber with theirinner faces preferably flush with the inner faces of said sidewalls; twowaterboxes,f2 and f3, supported upon the upper edges of the twoside-frames fand f', respectively, with their inner edges projectingbeyond theinner faces of the said side-frames, as most clearly shown inFigs. 3, 5, 6, 7 and 8, and an ignition-block-supporting beam e securedat its opposite ends to and extending between the two side-frames fandf. The construction and organization of these parts will be hereinaftermore fully defined.

The traveling grate or furnace-door proper, designated in a general wayby G, will preferably be of a construction similar to that of thetraveling grate described in Letters Patent of the United States No.515,656, granted to me February 27, 1894, to which reference may be had,it consisting of a series of grate-barcarrying beams N, supported atopposite ends upon a pair of endless chains 50, which run uponchain-wheels 12 and 14, that are carried by shafts, 13 and l5,respectively, and a series of grate-bars or floor-plates M,removablycarried upon said beams, said grate-bars being so disposed asto leave air-spaces of the requisite area between successive grate-bars.Inasmuch as the particular construction and organization of the partscomprising the traveling grate proper constitute no part of my presentinvention, and inasmuch as said grate is fully described in Patent No.515,656, referred to, a detailed description thereof is deemedunnecessary in the present application.

According to my present invention, the chain-wheel shafts 13 and 15,respectively, are journaled in bearings,13 and 15 respectively,one'shaft 13 at the forward end of the gratemechanism-carrying frameworkF, and the other shaft 15 at the rearward end of said framework, as mostclearly shown in Fig. l of the drawings. These bearings 13 and 15 are inthe nature of journal-boxes which are removably secured to the ends ofthe sideframesfandf. (See Fig. 9, Sheet 6.)

In furnaces of this class employing endless traveling grates, thecarrier-wheel shafts of the traveling grate have usually been journaledin fixed bearings1 and considerable difficulty has been experienced insecuring the proper tension or tautness of 'the traveling grate whenassembling the same in working position, and no provision has been madefor drawing the endless grate taut after it has once been set. inworking position. This matter of adjustment of the endless travelinggrate after the assembling thereof to not only compensate forlongitudinal expansion and contraction thereof, but to facilitatesettingup, is of considerable importance in the art to which thisinvention appertains. As a convenient means for drawing the endlessgrate taut longitudinally and for loosening the same after it isassembled in working position upon its carrier-wheels, have providedjournalbearings for the chain-wheel-carrying shafts which are adjustableone toward and from the other and in the direction of travel of saidgrate, as most clearly shown in Figs. 1, 9, 10 and 12 of the drawings.In the form thereof herein shown, the two journal-boxes at one end ofthe framework which support one of the gratecarrying shafts and hereinshown as the one 15 at the rear end of said framework, areadjustably-secured one to each frame fand f', at a pointintermediate tothe upper and lower edges of said frame, preferably by means ofcarrier-screws or adj usting-screws, 16, screwed into the ends of theframesfandf and each having a head 16', that forms an abutment for theouter face of the flange of the journal-box and having aremotely-disposed liange 16 which forms an abutment for the inner faceof said journal box, the anges of said journal boxes being slotted attheir ends midway of their Awidth so as to straddle the shank of theadjusting screws intermediate to the head and flanges thereof, as willbe readily understood by reference to Figs. 9,10 and 12 of the drawings.

The traveling grate and the chain-wheels which carry the same aresupported intermediate to the two side-framesf and f with the outerside-edges of the grate in close proximity to the inner faces of saidframes f and f and with the outer side edges of the gratebar-carryingbeams of the upper run of said grate underlying the inner side-edges ofthe water-boxes f2 and f3 supported upon said side-framesj' and f',respectively.

In securing the proper adjustment of the endless traveling grate afterthe same has been placed in position upon its carryingwheels 12 and 14,and the shafts 13 and 15 of said carrier-wheels, or chain-wheels, arefitted in the bearings 13 and 15', respectively, the journal-boxes atthe rear end of the framework will be moved outward as shown in Fig. 12by means of the adjusting-screws 16 the requisite distance todraw theendless grate taut, and, if desired, bearing-blocks, 17, may be insertedbetween the inner faces of the journal boxes and the outer end-faces ofthe side-framesfand f', respectively, after which the adjusting-screwsmay be tightened to bring the shaft 15 into proper alignment.

To secure lightness of construction and at the same time the requisitestrength in the side-framesf and f to carry the mechanism beforedescribed in connection with said sideframes, these side-frames are eachin the nature of channeled beams, preferably of cast metal, and each hasoutwardly projecting flanges, 60 and 60', at their upper and loweredges, respectively, and each has similarendtianges, 6l and 61', atopposite ends thereof with strengthening ribs, 62, intermediatethereto.l The flanges 60 at the upper edges of the side frames will beof suitable width to form bearings for the water-boxes]2 and f3supported upon said sideframesfand f',

IOS

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respectively". The lower flanges 6 0 are of sufficient Width to form asuitable supporting base for said side-frames, which base, in practice,will rest upon and be supported by the masonry comprising the side walls2 and 4 of the furnace chamber, and the end-flanges 61 and 61' will beof sufficient Width to form suitable bearing faces for the journal-boxes13 and 15', respectively. The webs 63, which constitute the side-wallsof the side-frames, will preferably be transversely recessed or coredout to form side openings, 64, 65, 66, 67, 68 and 69, the functions ofwhich will be hereinafter described.

As a means for supplying air to the fuel at varying pressures atsuccessive points in the length of the furnace-chamber to secure thebest practical results in the combustion of said fuel after the mannerdescribed in Letters Patent of the United States No. 499,715, granted tome June 20, 1893, I have provided an air-blast apparatus which is shownlocated underneath thc upper run of the grate and comprises a series ofair-blast chambers, herein shown as six in number and designated by a,a', a2, a3, a, and a5, respectively, located intermediate to and securedto the side-frames f and f in a manner substantially as hereinafterdescribed.

As illustrated most clearly in Figs. 4, 9 and 10, each side frame isprovided upon its inner face near the lower edge thereof with projectingflange 70, the contour of which corresponds to the cross-sectional shapeof the base-portion c of the walls of the successive air-supplychambers, a, a', a2, as, d4 and a5, respectively, said flange 7 O beingherein shown as segmentally curved, said curved segments being adaptedfor supporting the base-portions c ofthe walls of said chambers, whichare secured thereto preferably by bolts, as most clearly shown in Fig.4. Asa means for forming a support and bearing for the upper portion dof the walls of the successive air-supply chambers, the side-frames areeach provided with a series of L-shaped flanges 7l upon their innerfaces near their upper edges, the depending portions of which successiveflanges are in parallelism with and adjacent to the side-edges of thesuccessive side openings of the sideframe's, and the upperlongitudinally-disposed portions of which flanges are in parallelismwith and adjacent to the upper edges of said openings and extend, themajor portion of them, over and terminate near the center of the upperedge of said openings, as shown in said Figs. 4, 9 and 10. Thesuccessive air-supply chambers consist of the lower curved walls c,which are bolted at their opposite ends to the lower flanges 71 of thetwo side-frames f and f', and the side-walls d which are bolted to saidlower walls, and extend upward and around and are bolted to the L-shapedflanges as illustrated most clearly in Fig. 4, the upper edges of theside walls of the successive air-supply charnbers terminating, the majorportion of them,

at a point above the upper edges of the side openings in the side framesand approximately central with relation to the Width of the air-supplychambers the space intermediate to the terminating end of said side walland the side-wall of the next adjacent airsupply chamber furnishing anair-supply outlet adjacent to the upper run of the grate of therequisite area for the efflux of air required at this point in thelength of the furnacechamber.

Air is supplied to the air-supply chambers from a supply-pipe P,communicating, preferably, with the larger air-supply chamber a' whichis located adjacent to the ignition point of the fuel-carrying run ofthe grate or at that `point where the maximum supply of air is requiredfor securing the best resultsin the combustion of the fuel. Thesupply-pipe P, will receive its supply of air from any suitableair-supply such as a blower or air-pump (not shown). In the presentinstance the supplypipe P is shown asa tributary of a main supply-pipep', suspended by a hanger, 75, above the roof of the furnace-chamber,said hanger being secured to a beam which constitutes one member 76 of aframe or scaffolding, designated in a general way by S, and which may beof any desired construction, the'main supply pipe P', extendingtransversely of the furnace and being adapted for supplying air to theair-supply apparatuses of a series or battery of furnaces set side byside.

As a means for supplying air from the chamber ct' to the other chambersd, a2, 01.3, d4 and 0,5, and as a means for regulating the supply of airto said chambers to secure the requisite varying pressures at dilferentpoints in the length of the furnace-chamber, the walls intermediate toand dividing the air-supply chambers one from another have each a seriesof transverse perforations 78, therein and areeach provided with aperforated slide-valve or gate 79, adapted for increasing or decreasingthe areas of the openings in said walls as required to increase ordecrease the volume of air passing from one chamber to another tothereby secure the requisite air-pressure in each air-supply chamber.These valves will be supported and will be operated from the outside ofthe furnace Walls in the usual manner.

In practice, the upper and lower runs of the endless traveling gratewill be supported at theiropposite sides by rollers 51, carried uponshafts 51', the upper ones of which extend crossuise ofthe furnace-chamber between the side-frames fand f', and as a convenient IOO IIO

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means for supporting and permitting the ready removal of the upperroller carrying shafts 51', the side-frames fand f' are provided with aseries of inwardly projecting semi-circular flanges or sockets SO,adapted for receiving the ends of said shafts as will be readilyunderstood by reference to Figs. 1, 6, 8, 9 and 10 of the drawings. Thelower roller carrying shafts will be supported in suitable socketshaving a connection with the side-walls 2 and 4 of the furnacechamber.

For the purpose of preventing the leakage of the air-blast forwardly ofthe ignition-point 23 inthe furnace, an air-seal tank K is shownarranged after the manner described in my prior patent, No. 510,588,dated December 12, 1893, to which reference may be had. One portion 24,of the air-supply chamber a, and one portion of a hood 81, at one end ofand covering the forward end of the grate-mechanism, extends downwardbelow the water-line w, in said tank so as to effectually cut offcommunication between the extreme forward portion of the grate-mechanismchamber and the rearward portion thereof as will loe readily understoodby reference to Figs. 1 and 4 of the drawings.

As a means for imparting a traveling movement to the upper and lowerruns of the grate in opposite directions, the shaft 13 is provided atone end thereof with a Worm-wheel 40, and is driven by means of a worm41, upon a vertically-disposed intermediate shaft 42, carried inbearings upon an upright of the scaffolding or frame S, which shaftcarries at its upper end a worm-wheel 40', which is driven by a worm 41upon a horizontally-disposed driving shaft 42', journaled in bearingsupon a horizontal member of said scaffolding as shown .most clearly inFigs. 1 and 2, which shaft 42 carries a driving pulley 44, which may bedriven by a belt (not shown) extending to any suitable source of power.

The water-boxes f2 and f3 will preferably be of angular construction incross-section as shown most clearly in Figs. 7 and S, and will each havean upward extension at the forward end thereof, as shown at 90, havingan inclined inner face 91, which coincides, substantially, to theinclination of the inner face of the ignition-block B and has its outerend inclined at the inner side thereof as shown at 92 to form anabutment for preventing inward movement of the ignition-block when thesame is secured in place, whereas the inner face of tne extension 90formsa base upon which to lay the bricks constituting the forward end ofthe side-walls of the furnacechamber. These water-boxes are cored out,as shown in Figs. 7 and 8, and is shown by dotted lines in Fig. 5, toform a receptacle for water which is admitted thereto through a pipe 94,at the forward end of said waterboxes and is discharged through anopening` at the rearward ends of said water-boxes.

By the construction and arrangement of the metallic framing hereinbeforedescribed, it will be seen that the side-frames, waterboxes, andtraveling grate may be placed in working position in a unitary conditionwithin the furnace-chamber, sufficient of the sidewalls of the furnacebeing first laid to form a base upon which to support the side-frames,after which the remaining portion of the sidewalls may be built upon andaround said frames, the ignition block with its support- As illustratedmost clearly in Figs. 3 and 4,

the upper inner edges of the side-frames are longitudinally recessed orinwardly curved, as shown at 95, to form pockets having downwardlyinclined faces for the reception of gravity air-seals 96, which are inthe nature of elongated rollers adapted for bearing against theside-edges of the grate-bar-carrying beams of the endless grate andcovering the spaces intermediate thereto tothereby prevent leakage ofair at the side-edges of said grate.

Communicating with the interior of the successive ai r-supply chambers,from the ou tside of the furnace, are a series of traps or cleaningtlues 96,through which dirt and ashes or analogous deposits in theair-supply chamber may be drawn out.

As a means for regulating the supply of fuel to the traveling grate, agate, 97, is provided which may be of usual construction and which willpreferably be located within the hopper H and adapted for opening andclosing the discharge-opening of said hopper.

Having thus described my invention, l claim- 1. The herein -describedtraveling grate furnace, consisting of the furnace-chamber C havingsuitable inclosing-walls; a gratemechanism and air chambersupportingframe arranged longitudinally and at an inclination within saidfurnace-chamber and consisting of two remotely-disposed, transverselyrecessed side-frames supported by the side-walls of the furnace-chamberand carrying at opposite ends thereof journal-boxes, the boxes at oneend being adjustable relatively to the boxes at the other end, a seriesof air-supply chambers having inlet and ontlet openings and secured attheir ends to anges upon the side-frames, as set forth, means forsupplying air to said air-supply chambers, carrier-wheels having shaftsjournaled in thejournal boxes of said side-frames, an endless gratecarried by said carrier-Wheels and comprising a series of transversegratebeams supported at their ends upon endless chains carried over saidwheels, and a series of longitudinally-disposed grate-bars removablycarried by said beams, means for supplying and regulating the supply offuel to the upper run of said traveling grate, supporting rollers forthe upper and lower runs of the traveling grate, a water-tank locatedbelow the forward end of the lower run of said grate, transversepartitions or cut-off plates extending into and below the water-line ofsaid tank,and driving-mechanism for the endless traveling grateconsisting of a wormwheel carried by the forward carrier-wheel shaft, anintermediate vertically-disposed worm-shaft carrying a worm at the lowerend thereof in mesh with the worm-wheel of the carrier-wheel shaft andcarrying a worm- IIO wheel at the upper end thereof, ahorizontallydisposed driving-shaft carrying a worm in mesh with theworin-wheel of the intermediate worm-shaft and means for drivingsaidshaft, substantially as described and for the purpose set forth. f

2. In a furnace of the class specified, the combination with thefurnace-chamber and with its inclosing walls; of a fram e-workconsisting of two longitudinallyand remotelydisposed side-frames havinga series of transverse openings therein, and having flanges upon theinner faces thereof adapted for supporting the walls of the air-supplychambers, and having also laterally projecting flanges in position andadapted to be engaged by the furnace-walls and to maintain said framesin position; an air-supply apparatus comprising a series of successiveair-supply chambers having inlet and outlet openings, and having thewalls thereof secured to the inner flanges of the side-frames,substantially as described and for the purpose set forth.

3. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing walls, of two longitudinally andremotely-disposed side frames embedded one in each of the side-walls ofthe furnace-chamber and having inwardly-projecting flanges adapted forsupporting an air-supply apparatus and having journal-boxes at oppositeends thereof, the boxes at one end being adjustable relatively to theboxes at the other end, an endless traveling grate supportedintermediate to said side-frames upon revoluble carriers carried uponshafts journaled in said journal boxes, means for imparting a travelingmovement to said grate, a series of air-supply chambers locatedintermediate to said side-frames and having their walls fixed to theinner flanges of said side-frames and having inlet and outlet openings,and means for supplying air to said successive air-supply chambers atvarying pressures, substantially as described and for the purpose setforth. i

4. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing walls, of two transversely recessedside-frames having inwardly-projecting air-chamber-supporting flanges,and having journal-boxes at opposite ends thereof, the boxes at one endbeing adjustable relatively to the boxes at the other end, an endlesstraveling grate adjustably-carried upon revoluble carriers having shaftsjournaled in said journal-boxes, means for imparting a travelingmovement to said grate, a series of rollers interposed between theside-edges of the upper run of the traveling grate and the upper edge ofthe side-frames, an air-blast apparatus comprising a series ofsuccessive air-supply chambers secured to the inner flanges of theside-frames and having valveregulated openings intermediate to saidchambers, and means for supplying air to one of said chambers, andthrough said chamber to the succeeding chambers, substantially asdescribed and for the purpose set forth.

5. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing walls, of two side frames supported bythe masonry of the side-walls of the furnace and havinginwardly-projecting airchamber-supporting flanges and havingjournal-boxes adj nstably and removably-secured to the opposite endsthereof, two hollow water-boxes secured one to the upper edges of eachside-f rame and having upwardly' inclined extensions at the forward endsthereof constructed to forman abutment for an ignitionblock, anignition-block carried upon a transverse beam having ianges at theopposite ends thereof secured to the two side-frames, whichignition-block abuts atits forward face at opposite ends thereof againstthe upwardlyinclined portions of the water-boxes, an endless travelinggrate supported intermediate to the two side-frames uponrevoluble-carriers carried upon shafts journaled in the journal-boxes ofthe side-frames, means for imparting a traveling movement to said grate,

ing air at varying pressures to said successive air-supply chambers,substantially as described and for the purpose set forth.

6. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing-walls, of two transverselyrecessedinwardly and outwardly flanged sideframes having their outwardlyextending flanges in position and adapted to bev engaged by thefurnace-walls to maintain said frames in position, and havingair-seal-reeeiving pockets at the upper edges thereof, waterboxessecured to the upper edges of said sideframes with the inner edgesthereof extending beyond the inner faces of said side-frames, an endlesstraveling grate supported for travcling movement between the side wallswith the side edges of the upper run thereof in close proximity to theupper edge of the sideframes, air-seal rollers supported in the airsealpockets of the side-frames and bearing against the side edges of theupper run of the grate, a series of air-supply chambers secured at theiropposite ends to and supported by the inner franges of the side-frames,means for imparting a traveling movement to said grate, and means forsupplying air to said air-supply chambers, substantially as describedand for the purpose set forth.

7. In a furnace of the class specified, two longitudinally andremotely-disposed sideframes having a series of transverse recesses andhaving outwardly projecting flanges near the upper and lower edges ofthe inner faces thereof, a series of air-supply chambers locatedintermediate to said side-frames and each comprising a bottom wallsecured tothe lower flanges of the side-frames and side-walls secured tosaid bottom walls and to the upper IOO Irs

fianges of said side-frames, and each chamber having` an inlet and anoutlet opening, and means for supplying air thereto, substantially asdescribed and for the purpose set forth.

8. In afurnace of the class specified, a gratemechanism-and-air-cha|nbercarrying frame consisting of two longitudinally and remotelydisposedchanneled side-fram es, each of which has a series of outwardlyprojecting air chamber-supporting flanges upon the inner faces thereof,and each of which hasa journal-box at each end thereof,on e of whichjournal-boxes is adjustable relatively tothe other, substantially asdescribed and for the purpose set forth.

9. In a furnace of the class specified, agratemechanism-and-air-chamber-carrying frame consisting of twolongitudinally and remotelydisposed channeled side-frames securedtogether by stay-rods, and each having a series of outwardly-projectingairchamber-su pporting flanges upon the inner faces thereof; each havinga journal-box at each end thereof, one of Which journal-boxes isadjustable relatively to the other, and each having an air-seal roller'-receiving pocket, or recess, at the upper inner edge thereof,substantially as described and for the purpose set forth.

10. In a furnace of the class specified, a grate-mechanisnmand-airchambercarrying frame consisting of twolongitudinally-and-remotely-disposed channeled side-frames, each ofwhich has a series of outwardlyprojecting air-chamber-supporting flangesupon the inner faces thereof, journal-boxes at opposite ends thereof,one of which journal-boxes is adjustable relatively to the other,semi-circular bearing-flanges, or sockets, formed integral with theinner faces of each of said sideframes near the upper edge thereof, andeach having air-seal receiving-pockets at the upper inner edge thereof,substantially as described and for the purpose set forth.

1l. In a furnace of the class specified, the combination With thefurnacecl1arnber and its inclosing Walls, of twolongitudinally-andremotely-disposed side-frames supported in the masonryof the side-walls of the furnacechamber andhavingair*chamberesupportingflanges upon the adjacent faces thereof and havingsemi-circular bearings or shaft-supporting anges upon their adjacentfaces near the upper edges thereof, gratesupporting rollers carried upontransverse shafts supported in semi-circular bearings upon the innerfaces of the side-frames, an endless trav eling grate supported uponsaid rollers and carried at opposite ends by revoluble carriers havingshafts journaled in bearings secured to the ends of said frames,air-supply chambers fixed to the chamber-supporting flanges of theside-frames, means for actuating said traveling grate, and means forsupplying air to said Vair -chambers, substantially as described and forthe purpose set forth.

l2. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing-Walls, of the endless travelinggrate-mechanism comprising two side-frameslongitudinally-and-remotely-disposed and inclined with relation to thefurnace-chamber and adapted for supporting the endless traveling grate,an endless traveling grate carried over chain-Wheels secured to shaftsjournaled in bearings upon opposite ends of the side-frames, means foradjusting one of said shafts relatively to the other shaft, andactuating mechanism for said grate consisting of a horizontaldriving-shaft located above the furnace, a vertical intermediateWormshaft, a worm-Wheel and Worm connecting said intermediate shaft withthe drivingshaft, and a Worm and Worm-Wheel operatively connecting saidintermediate shaft and one of the chain-wheel shafts, substantially asdescribed and for the purpose set forth.

13. In a furnace of the class specified, the combination with thefurnace-chamber and its inclosing-Walls of an endless traveling gratecomprising connected transverse gratebar-carrying beams and grate-barsremovably-secured to said beams carried upon chain- Wheels at oppositeends of the furnace-chamber secured to transverse shafts journaled inbearings independent of the side-Walls of the furnace-chamber atopposite ends, respectively, of a carrying frame, agrate-mechanism-carrying frame, consisting of twolongitudinally-and-remotely-disposed side-frames havingchain-Wheel-shaft-supporting bearings at opposite ends thereof andhaving a series of air-supply chambers secured thereto, and meanssubstantially as described for adjusting one of said chain-Wheel shaftsrelatively to the other shaft, substantially as described and forthepurpose set forth.

ECKLEY B. GOXE. 1Witnesses:

JAMES I-I. NoRRIs, AMBRosE EvEs.

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